Why Did My Website Suddenly Disappear from Google Search Results After 7+ Years of Top Ranking?

I’ve been managing a website that ranked #1 on Google for several keywords for over 7 years. However, just recently, it completely disappeared from Google search results. The strange part? It still ranks #1 on Bing, Yahoo, DuckDuckGo, and other search engines.

Here’s what I’ve observed:

1. A site search (site:example.com) shows that all pages are still indexed.

2.Google Search Console shows no manual action or security issues.

3.Two days ago, some keywords brought the site back to page 1, but the next day it was gone again.

4.Traffic from Google has dropped to almost zero, while other sources remain stable.

Has anyone faced a similar issue or know what could be causing this? Could this be a bug, algorithm update impact, or something else entirely?

Any insights or suggestions would be greatly appreciated.

Thanks in advance!